[Dovecot] POP3 - Mark messages as read

[Jose Gervasio Gomiz]

Hi all. I have a little problem with Dovecot.
My POP3 users can retrieve their emails without problem, but if they have 
"Leave mail in server" (or similar) active in their clients, their mboxes 
doesn't get updated marking those messages as read.
If I access their mboxes locally with "mail -f username" I can see every 
message marked as non-read, something that never happened before when I used 
qpopper. I should note that when they retrieve their emails afterwards those 
previously received doesn't arrive again (correct behavior).

My setup is:

RHEL 4 Update 4
dovecot-0.99.11-4.EL4 (last version in RH Updates)
mbox format, external POP3, local only IMAP (Squirrelmail)

I couldn't find references to this in /etc/dovecot.conf, the FAQ or via web 
searching.
Should I upgrade to dovecot-1.x to solve this? Even if RH doesn't support it 
yet?

Any info would be greatly appreciated.

Jose Gomiz